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Title: Study of the photocatalytic and sensor properties of ZnO/SiO{sub 2} nanocomposite layers

ZnO/SiO{sub 2} nanocomposite layers are deposited onto glass substrates by the sol-gel method. The fraction of SiO{sub 2} is 20%. The layers are produced by single or double deposition and sol centrifugation. To study the photocatalytic properties of the samples, experiments are performed on the decomposition of Malachite Green oxalate in aqueous solutions under the action of light in the ultra-violet and visible (UV/VIS) spectral ranges. The gas-sensitive properties of the layers are examined by impedance spectroscopy in various gas atmospheres. In all experiments, double-layer ZnO/SiO2 nanocomposites exhibit a higher efficiency, compared with the rest of the samples, irrespective of the irradiation type. The double-layer samples also show the best sensitivity to acetone and isopropanol vapors.
Authors:
;  [1] ; ;  [2] ; ; ;  [1] ;  [2] ;  [3]
  1. Sofia University (Bulgaria)
  2. St. Petersburg State University of Electrical Engineering LETI (Russian Federation)
  3. Russian Academy of Sciences, Ioffe Physical-Technical Institute (Russian Federation)
Publication Date:
OSTI Identifier:
22300417
Resource Type:
Journal Article
Resource Relation:
Journal Name: Semiconductors; Journal Volume: 47; Journal Issue: 12; Other Information: Copyright (c) 2013 Pleiades Publishing, Ltd.; http://www.springer-ny.com; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; AQUEOUS SOLUTIONS; COMPOSITE MATERIALS; DECOMPOSITION; DEPOSITION; DEPOSITS; EFFICIENCY; IRRADIATION; NANOSTRUCTURES; OXALATES; PHOTOCATALYSIS; PROPANOLS; SENSITIVITY; SENSORS; SILICA; SILICON OXIDES; SOL-GEL PROCESS; SPECTROSCOPY; SUBSTRATES; ZINC OXIDES